expm1

(PHP 4 >= 4.1.0, PHP 5, PHP 7)

expm1 —
Returns exp(number) - 1, computed in a way that is accurate even
when the value of number is close to zero

Descrierea

floatexpm1
( float$arg
)

expm1() returns the equivalent to
'exp(arg) - 1' computed in a way that is
accurate even if the value of arg is near zero,
a case where 'exp (arg) - 1' would be
inaccurate due to subtraction of two numbers that are nearly equal.

Parametri

arg

The argument to process

Valorile întoarse

'e' to the power of arg minus one

Istoricul schimbărilor

Versiune

Descriere

5.3.0

This function is now available on all platforms

A se vedea și

log1p() - Returns log(1 + number), computed in a way that is accurate even when
the value of number is close to zero